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INDUSTRIAL EVAPORATORS

SSTWB Workroom Units

Low velocity air units for processing rooms. These models feature axial fans and many end user oriented features.

One to Five Fan Models

Hinged Access Panels

Sloped Top Panels

Dual Sloped Full Coverage Drain Pans

Rated in Accordance with AHRI Standard 420

Design Features

Maintenance Features

Optional Equipment

Unit Specification

SSTWB Workroom Units - Design Features

The STW evaporators are equipped with owner-oriented benefits that improve the operation of processing rooms. The ease of maintenance and improved accessibility reduces downtime required for clean-up.

Hinged Fan Panels

All casing panels on STW Evaporators are hinged to facilitate cleaning. Where most workroom units have removable casing panels, the hinged panels on the STW reduce the time required to service the evaporator.

Fan and Fan Motors

All fan motors including fractional horsepower fan motors are foot mounted for improved durability in a wide range of operating conditions. EVAPCO worked closely in conjunction with leading motor manufacturers to develop fan motors specifically for evaporator applications. Fan motors on catalog models up to 1-1/2 horsepower are equipped with automatic thermal overload protection and all fan motors are pre-wired to a NEMA 4X junction box. Fan motors are mounted on structural channels designed and built by EVAPCO to operate reliably and are guaranteed against structural failure caused by low temperature conditions.

STM Evaporators are furnished with heavy Optional Cast Aluminum Fan Blades duty sheet metal fans as standard. EVAPCO has selected these fans specifically for their efficiency as well as for their low sound to improve worker comfort and safety. Optional cast aluminum fan blades are available to meet special low temperature applications.

Drain Pan

The drain pans on STW Evaporators are sloped in two directions to prevent water from pooling in the pan. The drain pans are custom engineered and equipped with swaged bottom outlets to ensure complete drainage of the pan. The drain pan ships factory mounted on the unit.

Full Coverage, Fully Accessible

The drain pans on STW Evaporators provide full coverage of the entire casing section and coil connections as standard. This ensures that all moisture from the evaporator collects in the drain pan while preventing any water droplets from falling into the refrigerated space. In addition, the drain pans are fully accessible. The operator has access to the entire drain pan for cleaning without any disassembly.

Sloped Top Panels

The top panels of ST W Evaporators are sloped to prevent moisture from condensation or clean-up cycles from accumulating on the top of the unit. Water from the top of the unit will drain into the over-sized, full coverage drain pan, improving the cleanliness of the unit and preventing the possibility of product contamination.

Ease of Installation

STW Evaporators are designed for greater structural rigidity and easier installation. Shipping supports incorporate structural channels that allow them to be safely lifted into position using a forklift. Once the unit is installed, the supports are easily removed. The increased structural integrity of the STW evaporators allow for the elimination of shipping skids and crating disposal expense.

Hinged Fan Panels

Fan and Fan Motors

Drain Pans

Full Coverage

Sloped Top Panels

Ease of Installation

SSTWB Workroom Units - Maintenance Features

Hinged Fan Panels

All casing panels on STW Evaporators are hinged to facilitate cleaning. Where most workroom units have removable casing panels, the hinged panels on the STW reduce the time required to service the evaporator.

Ease of Installation

STW Evaporators are designed for greater structural rigidity and easier installation. Shipping supports incorporate structural channels that allow them to be safely lifted into position using a forklift. Once the unit is installed, the supports are easily removed. The increased structural integrity of the STW evaporators allow for the elimination of shipping skids and crating disposal expense.

Hinged Fan Panels

Ease of Installation

SSTDB Low Profile Coolers - Optional Equipment

Defrost

ST Series Evaporators with air defrost are equipped with full coverage insulated drain pans.

ST Series Evaporators with water defrost are equipped with a water distribution system and a special drain pan to prevent water from splashing into the refrigerated space.

Hot gas defrost options include the coil only or hot gas coil and pan. For coil only defrost, ST Series Evaporators are equipped with insulated drain pans. For hot gas coil and pan, ST Series Evaporators are equipped with a hot gas coil under the inner drain pan. The unique design of the hot gas drain pan provides for highly efficient defrost. Hot gas defrost units may be piped with either parallel feed to coil and drain pan or series flow from drain pan to coil. Hot gas pan-to-coil piping includes a factory mounted check valve.

Air

Water

Hot Gas

Electrical

Fan Motors on ST Series Evaporators are prewired to a terminal box as standard. Wiring on one and two fan models terminate with leads inside a NEMA 4x junction box. For models with three or more fan motors, a terminal strip is included to which the motor leads are wired. Other electrical options include:

Prewired to Terminal Strip

Prewired to a Common Non-Fused Disconnect

Prewired to Disconnect with Thermal Overload Protection

Prewired to Magnetic Motor Starter with Disconnect Common Non-Fused Disconnect

Fan Motors

All ST Series Evaporators are supplied with totally enclosed air over (TEAO), foot mounted fan motors with sealed bearings and low temperature grease. Standard motors range from 1/2 horsepower fractional motors to 5 horsepower and are suitable for 230/460 volt, 3 phase, 60 cycle applications. In addition, standard motors are across-the-line start and operate at either 870, 1160 or 1750 rpm. All 870 rpm motors up to 1 hp, all 1160 rpm motors up to 1-1/2 hp and all motors up to 2 hp 1750 rpm are equipped with automatic thermal overload protection. Optional motors are available, some of which are detailed below.

Multi-Speed ST Series Evaporators may be equipped with multi-speed fan motors to match equipment capacity to reduced heat load requirements.

Inverter Duty ST Series Evaporators may be equipped with VFD duty fan motors for infinite steps of capacity control.

Washdown Duty For applications requiring CIP or water clean-up cycles, ST Series Evaporators may be equipped with washdown duty fan motors.

Coil Options

Reheat Coil Optional reheat coils are available for applications requiring humidity control. A separate heating coil is designed and circuited for refrigerant or an alternate heat source and is installed on the leaving air side of the cooling coil to heat the air to the desired temperature. Consult your EVAPCO Industrial Refrigeration Representative for selection and application assistance.

Variable Fin Spacing For applications where heavy frost loads are anticipated, variable fin spacing is available to extend cycles between defrost. Variable fin spacing is available in 1.5 / 3 fpi or 2 /4 fpi in two row increments. Consult your EVAPCO Industrial Refrigeration Representative for selection and application assistance.

Drain Pan Options

Hot Gas Defrost Drain pans equipped with hot gas defrost incorporate a unique tube design mechanically bonded to the underside of the pan liner and secured with a retaining plate. The hot gas coil design provides more heat transfer surface area and results in improved defrost performance with very low pressure drop. The construction features yield a completely flat, easy to clean interior pan surface.

Stainless Steel Construction Inner pan liner, outer pan cover or both

Heat Tracing Inner pan liner Outer pan cover

Over-sized Drain Pan Wider and/or longer than standard

Custom Coils

EVAPCO offers a broad range of unit configurations along with engineering expertise and manufacturing capability to design and build virtually any type of non-cataloged custom coil or special unit, some of which are featured below. We welcome the opportunity to meet with you and discuss your custom coil applications.

Defrost

Elecrical

Fan Motors

Coil Options

Drain Pan Options

Custom Coils

STW Series Evaporators

Low Velocity Workroom Units

Innovative Design Features with Superior Quality, Performance and Dependability

Low velocity air units for processing rooms. Units feature stainless construction with hinged panels for easy access. STW Evaporators are designed to provide working comfort in high occupancy rooms. STW Evaporators are offered with Stainless Steel tubes and aluminum fins.

Design Features

Heavy Duty Coil with Stainless Steel Tube with Aluminum Fin. Standard Catalog Models with Three, Four or Six Fins per Inch, Variable Fin Spacing Available as an option.

Coil Built in Accordance with ASME/ANSI B31.5. Charged With Nitrogen Prior to Shipment to Prevent Entry of Moisture and Contamination. Pressure Tested Under Water to 400 PSIG.

Hinged Access Panels with Conveniently Located Fasteners Allow Cleaning and Inspection of Coil and Fan Motors and Reduces Maintenance Time.

Totally Enclosed Air Over (TEAO) Fan Motors with Internal Thermal Overload Protection, Sealed Bearings and Low Temperature Grease for Reduced Maintenance and Longer Life. Two Speed/Two Winding Motors Available as an Option. Fan Motors may be Wired to Common NEMA 4X Junction Box and Supplied With Disconnects and/or Starters.

Totally Enclosed Air Over (TEAO) Fan Motors with Sealed Bearings and Low Temperature Grease for Reduced Maintenance and Longer Life. Fan Motors on Catalog Models up to 1-1/2 HP are Equipped with Automatic Thermal Overload Protection. Individually Wired Fan Motors to NEMA 4 Junction Boxes. Motors may be Supplied with Disconnects and/or Starters.

Sloped Top Panels to Prevent Moisture from Accumulating on the Top of the Unit. Water from the Top of the Unit will Drain into the Over-sized,

Full Coverage Drain Pan, Improving the Cleanliness of the Unit and Preventing the Possibility of Product Contamination. Full Coverage, Fully Accessible Drain Pans Provide Full Coverage of the Entire Casing Section and Coil Connections. This Design Ensures that All Moisture from the Evaporator Collects in the Drain Pan while Preventing any Droplets from Falling into the Refrigerated Space. In Addition, the Drain Pans are Fully Accessible wth the Wet Coil Baffles Installed in the Middle of the Coil to Prevent Air Bypass and Allow for Drain Pan Access from Both Side of the Coil. Hygienic Drain Pans are Sloped in Two Directions to Prevent Water from Pooling in the Pan. The Drain Pans are Custom Engineered and Equipped with Swaged Bottom Outlets to Ensure Complete Drainage.

Hot Dip Galvanized Structural Steel Legs are Designed for Greater Structural Rigidity and Easier Installation. STM Models Ship with Sheet Metal Channels that Allow the Unit to be Easily Handled with a Forklift. Once the Unit is Installed, the Shipping Supports are Easily Removed.